Other sample characteristics
| Other characteristics | Number of interviewees |
|---|---|
| Number of interviewees from trials published between 2000 and 2004 | 6 |
| Number of interviewees from trials published between 2005 and 2010 | 23 |
| Number of interviewees from trials conducted through the MRC GPRF | 19 |
| Number of interviewees from trials conducted through other research units | 10 |
| Number of interviewees recruited from trials with loss-to-follow-up levels*: | |
| ≥20% | 10 |
| ≤20% | 17 |
*Two nurses not linked to a sample frame trial.